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Energy Harvesting‐Storage Bracelet Incorporating Electrochemical Microsupercapacitors Self‐Charged from a Single Hand Gesture
Author(s) -
Zhang Steven L.,
Jiang Qiu,
Wu Zhiyi,
Ding Wenbo,
Zhang Lei,
Alshareef Husam N.,
Wang Zhong Lin
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201900152
Subject(s) - triboelectric effect , supercapacitor , energy harvesting , energy storage , wearable computer , materials science , nanogenerator , wearable technology , electrical engineering , mechanical energy , electronics , power (physics) , battery (electricity) , energy (signal processing) , power density , automotive engineering , optoelectronics , computer science , electrochemistry , voltage , embedded system , electrode , engineering , physics , composite material , quantum mechanics
The development of wearable electronics and sensing networks has increased the demand for wearable power modules that have steady output, high energy density, and long cycle life. Current power modules, such as batteries, suffer from low energy density due to their limited storage capacity. One solution to avoid the issue is to build a hybrid device consisting of both energy harvesting elements that continuously harvest ambient mechanical energy, and electrochemical energy storage units to store the harvested energy. Here, a hybrid energy harvesting bracelet, which combines a dual electromagnetic and triboelectric nanogenerator to harvest wrist motions, is reported. The bracelet is able to charge the RuO 2 ‐based microsupercapacitor to 2 V with a single shake of human wrist, which allows the supercapacitor to power most electronic devices for minutes, such as a calculator, relative humidity, and temperature sensors.